While many of us are enjoying an easing of Covid-19 restrictions, government officials are preparing for new variants of the disease.
The Omicron BA 2 variant is the dominant strain, but there are others, including XE.
The government's investigating what restrictions could be brought back to slow any new outbreak.
Te Punaha Matatini physicist and contagion modeller Dion O'Neale spoke to Kim Hill.
